Not to burst your bubble or anything, but this is more-or-less known and well-documented. In fact, using a GTX 295 for anything less than a screen capable of 2560x1600 is a waste IMO, since the real power of the card is very visible at this resolution.

It's good to know though that we finally have someone saying other than "OMG! LOL my PC is teh PWNAGE! 4096MB of VRAM!".